Add ice, mango, lime juice, tequila and agave to a high powered blender.
Blend until smooth. If necessary, add additional ice or some ice cold water if the mixture is too thick.
To serve, use a lime wedge to go around the rim of the margarita glasses.
Place the kosher salt on a small plate. Turn the lime dipped glasses over onto the plate to cover the rim in salt.
Pour frozen margaritas into glasses and serve.
Calories: 246kcal | Carbohydrates: 29g | Protein: 1g | Sodium: 293mg | Potassium: 242mg | Fiber: 2g | Sugar: 24g | Vitamin A: 1340IU | Vitamin C: 54.5mg | Calcium: 19mg | Iron: 0.3mg